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Myelination will speed the nerve conduction velocity considerably. Myelin is found in Schwann cells which encircle a given axon. It acts mainly as an insulator so that depolarization in one cell does not set off depolarizations in adjoining cells. When a neural membrane is depolarized, local currents are set up between positive and negative ions causing membrane conduction. In myelinated fibers, the local currents go from one internode (or node of Ranvier) in between two Schwann cells to the next internode. Thus we have "salutatory conduction" where a neural impulse actually jumps from one internode to the next without being conducted down the entire cell membrane.
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Myelination in the brain serves to?
Myelination in the brain serves to increase the conduction speed of nerve impulses and improve overall communication between different parts of the brain. It also helps to protect and insulate nerve fibers, providing structural support and maintaining the integrity of the neural network.
What affects the speed of nerve transmission and how is it measured?
The speed of nerve transmission can be affected by factors such as the myelination of the nerve fiber, temperature, and the diameter of the nerve fiber. It is measured using techniques such as nerve conduction studies, where electrodes are placed on the skin to measure the speed of electrical impulses along a nerve.
How does myelination affect nerve conduction velocity?
Myelination will speed the nerve conduction velocity considerably. Myelin is found in Schwann cells which encircle a given axon. It acts mainly as an insulator so that depolarization in one cell does not set off depolarizations in adjoining cells. When a neural membrane is depolarized, local currents are set up between positive and negative ions causing membrane conduction. In myelinated fibers, the local currents go from one internode (or node of Ranvier) in between two Schwann cells to the next internode. Thus we have "salutatory conduction" where a neural impulse actually jumps from one internode to the next without being conducted down the entire cell membrane.
How does temperature on a physiological way effect nerve conduction?
Myelination will speed the nerve conduction velocity considerably. Myelin is found in Schwann cells which encircle a given axon. It acts mainly as an insulator so that depolarization in one cell does not set off depolarizations in adjoining cells. When a neural membrane is depolarized, local currents are set up between positive and negative ions causing membrane conduction. In myelinated fibers, the local currents go from one internode (or node of Ranvier) in between two Schwann cells to the next internode. Thus we have "salutatory conduction" where a neural impulse actually jumps from one internode to the next without being conducted down the entire cell membrane.
What reasons may explain difference in conduction rates?
Differences in conduction rates can be attributed to variations in fiber size, myelination, and temperature. Larger fibers conduct signals faster due to less resistance, while myelination increases conduction speed by allowing for saltatory conduction. Temperature can also affect conduction rates, as higher temperatures increase the speed of ion channel activation.
Is myelination of the nerve fibers in the Central Nervous System the job of the oligodendrocyte?
True
What is mylinazation?
Myelination is the process by which a myelin sheath is formed around nerve fibers, allowing for faster and more efficient transmission of electrical signals within the nervous system. This sheath is produced by specialized cells called oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system. Myelination plays a critical role in regulating nerve impulse conduction and promoting proper functioning of the nervous system.
Does one's temperature have an effect on his reflexes?
Yes, body temperature can affect the speed of nerve conduction, which in turn can influence reflex response times. Generally, lower temperatures slow down nerve conduction and may result in slower reflexes, while higher temperatures can speed up nerve conduction and reflexes.
What is the relationship between the degree of myelination and and conduction velocity?
That myelinated axons fare faster, unmyelinated are slower.
Which two characteristics of axons increases the speed of nerve impulse?
diameter and presence of myelination.....
What is the effect of the myelin sheath on synaptic transmission?
Myalin sheath gives insulation to the neurons. They also hasten the nerve conduction by saltatory conduction.
What structure is responsible for myelination of the nerve fibers?
In the peripheral nervous system the cell that myelinates an axon is called a Schwann cell. In the central nervous system myelination is carried out by oligodendrocytes.
